Heater



May 1, 192s.

F. SAUVAIRE HEATER yFiled Jan. 31, 1928 /N VEN TO.

FRANCIS SUVAIRE.

Patented May l, 1928.

UNITED jsTAT- ES amers saUvaInE. oF DALY CITY, CALIFQRNIA."

HEATER application mea'nnuary s1, 192s. serial Inarcassa` p n My invention relates to improvements in the constuction Vand arrangement of air heaters wherein a current of air is forced through an air chamber heated by a burner,

and delivered in a heated condition through a delivery connection to an outside point.

The primary object is to provide a heater of improved and simplified construction.

Another object is to provide an improved heater wherein a relatively large volume of airmay be heated with a very smallconsumption of fuel.` f

A Afurther object is to provide, as a new article of manufacture, an improved construction which'will facilitate the construction and assembly of. the heater and provide an economical and eflicient heater.

A still further object is to provide an imp proved device wherein inlet and delivery connections are arranged to seal the pas-v sages between the inner and outer shellsv of the' heater and to aline and retain said sages'in proper relation.

My invention consists of the improved details of construction and arrangement disclosed in the drawings forming a part of the present application wherein llke characters of reference are used to designate similar parts throughout the specification and drawings and in which- Fig. 1 is a vertical mid-section of my improved heatern construction; Y

Fig. 2 isa plan view of the heater; and

Fig. 3V is a transverse horizontal section.

Referring to the drawings, my improved construction consists of an outer shell, desig nated in general by the numerall, provided with `supporting legs 2 formed integrally therewith at the bottom thereof and rovided with an outwardly extending she f 3 adjacent thebottom of the shell. The shell 1 is preferably `cast inone piece from suit'- f able metal.

An air inlet opening 4 is formed in the wall of the shell near the bottom thereof and an air outlet opening' 6 is formed in the shell near the topthereof, ly above the inlet opening 4.

An inner shell consistin of spaced double walls 7 and 7 ,is mounte within the outer shell` 1. The inner shell is supported by means of a flange 8 arranged at the top of the inner shell and provided with a shoulder 9 arranged to seat around the top of the outer shell l. The inner wall 7 forms a vertically ldisposed central vent passage preferably direct-` open at top and bottom. The walll 7( vis spaced from the wall 7` to form an air chamber 11 closed at top and bottom within the inner shell aroundlthe vent passage said wall 7 being also spaced from the shell llto form a heat chamber 10 betweenthe inner and outer shells. Inlet and outlet passages 12 and 13 respectively, are formed upon the `lower and upper endsA of the inner shelly to extend across the heat passage and register with the inlet and outlet openings 4 and 6. `The inner shell is piece. c

An inlet connection 14 extends through the inlet opening 4 into the `inlet passage 112, and an outlet connection 15 extends through the outlet opening 6 into the outlet passage 13. The connections 14 and 15 fit closely within the registering openings and passages to seal the passage therethrough and to holdr the passage portions of the inner shell in proper registering relation to the corresponding openings in the outer shell. A suitable fan 16 is `mounted upon the shelf 3 and arranged to force a current of air through the inlet connection 14e` into the air chamber 11, said current moving u wardly through the air chamber to be elivered` through the outlet connection 15 throlgh which it is conducted and delivered at a esired point.

A suitable gas burner 17 is mounted within the bottom of the shell 1 adjacent the bottom of the heating chamber 10, said burner being mounted in any suitable mannerand supplied with fuel from a suitable source through a supply connection "18, the supply of fuel 'being controlled in the `well known manner. An opening 19 is formed in the shell 1 near the burner 17 to admit air to support combustion of the fuel.

In operation, the heater, constructedand assembled as shown and described, is heated bythe burner 17. Air forced throughfthe chamber 11 is heated by contact and radiapreferably cast in one* in a heated condition throughthe delivery f member 15, said heated fair serving to heat a compartment to which it is deliveredin the well knownmanner. `The heat chamberl, being openonly at the bottom, does not permit a circulation of air and as a result, the air therein `and the walls of the inner shell become heatedto a relatively high tempera- `ture at which they are maintained bya very small burner 17. The air circulating lie throughrthe chamber 1l absorbs heat which is carried through the outlet connection to a point relatively remote from the heater if desired.

The structure described and illustrated is of particular advantage because ot the simplicity and economyofconsti-uction.` The outer shell is cast as one member with the llegs 23nd shelf 3,.;formed integral therewith.

inner'` shellaisalso an integral member hnvingthe supporting flange 8 and the inlet and/outlet passages 12 and 13 cast integrally therewith; Whenassemhled, the inner shellI issup orted inv-properrelation and seals the topo the outer'shell, andwhenthe inlet` andioutleticonnections lli'and l5 are applied.; theshells are .effectively secured toand the. juncture s between the passigsand theopenings in the outer shell efwtfectivelyisealed. As a newarticle of manufacture, this improved structure affords aA simplicity-.and economy in manufacture and instsllutionconsttuting a material advance` inthe art.`

Havingthus demribed my invention what I'claim. as'newiand desire to secureby Letters Patentiis- Y t 1s Alantarticleoffmanufacture, a heater comprising; ran-outer.- shell having air inlet and outlet openings;` a double walled innerl shell mounted Vwithin'the outer shell and forminga central vent passage and an air. chamber surrounding-the vent passage; air

inlet@ and outletvf passages commun1catingwiththelair chamber and arranged to regis-r terwth the air Ainlet and outletopenings ofthaouter shell; air inletand outlet connec-, tions .extendingithrough the inlet and outlet openings into the corresponding passages andarranged, to seal and retain said passages -in communicating relationwith said` openings; aburner' mounted withinI the.

outer. shell -to heat the inner shell; and for; forcing a current of airthrou h Ltheair chamber of the inner shell where saidairmay be heated for delivery through thedelivery connection. Y

2. Ask an article of manufacture,a heater comprisingan outer shell havingv air inlet" iandoutlet openings andprovided with supportinglegsA -fqrmed integral therewith; a

dmylble walled-inner shell mounted within,

thelouter shell and forming a centraly vent eV andan air chamber surrounding the ,vent -passage;f air inlet and. outletripassages; opnnlngmto theair chamber and arranged to register wlth theair inlet and outlet opent.V

ingsgof the outershell; air inlet anddelivery` connectonsextending through the inlet and, outlet openings-into the corresponding pas -sageaand arranged to seal and retain said.,

passagesv ,Ainicommunicating relation with said openings; a burner mounted within the outer. shell to heat the inner shell; and means for forcing a current of air through ucommunicating relation 1with `sai a humor` molmtedwvithin the outer shell to vheat the inner shell; a shelf arrangedad'athe air chamber whereby said air may be heated for delivery through the delivery connection.

3; As an article oni-anufacture, a heater comprising an outer shell having air inlet and outlet openings; a ldouble walled inner shell mounted Within the outer shell and Y forming a centralvent passage and an air chamber surrounding the. ventl passage, said air chan'pberlieing closed at top and bottom; a iunge carriedby the inner shell and arranged Ato engage the upper edge of theouter shcllto close the top otsaid outer Vshell; and sup rtk the inner shell therein;- air linlet a4 outlet passages eonnectedto the innershell; and commun'matingwi-th thesair chamber therein; said passa .being arranged to register with lthe inlet andoutlet openings respectively oi the outerY shell; air inlet and delivery connections Iextending through ,the inlet and outlet openings. into Y the corresponding passages and arranged to seal `and retainy said paages in communi-I catingrelation withsaid` openings;,a bunner mounted `within the outenshell to heat .the innerV shell; and means-for forcing a.

current of air `,through the air chamber to be heated fon delivery through thedelivery conaectipn.v y

4.. Asunarticle o-imwufacture, a theater comprising an outershell `havingiinlet and outlet openings and ,provided 'with supporting le sgformed integral therewith; a double vralle Vinnershellv mountedwithin the outer shell andy forming a. central, vent tissage -anditanfairchambersurroundin t e vent passage, saidfairchamber beingc osedY at the top and bottom; a angg-,cauriedibytho t, inner shell and-,arranged to engage the upper edge of the outershellfte closethetopof lsaid Louter `shell and toY supportwthe inner shell tharein'with.4 that-walls of said inner shell-in spad relation to thawall, of the i outer shell to I form a heat passage therebef tween; air inletand outlet passages carried cent the bottom ofthe outer shell; and a an moumteduupon said shelfi andiarranged to direct a currentot air throughthe air, chamf l'ber to `be .heated forf deliveryJ through the delivery connection.;

5. an ,arteleoimanuiacture, a heater comprisi an outer casing 4Vforming a shell having i etA and outlet-'openings ad'acent the top ,and bottom respectively an t provided with supporting legs and an outwardasV l; extending shelf cast integrally with the s ell; an inner casing consisting of a double walled shell forming a central vent passage and an air chamber surrounding the vent passage, said vent passage being open at top and bottom and the air chamber being closed at top and bottom; a Hange cast integrally with the inner shell and arranged to seat upon the upper edge of the outer shell to close the top thereof and to support the inner shell with its Walls in spaced relation to the outer shell to form a heat passage therebetween; air inlet and outlet assages cast integrally with the inner s ell and arranged to extend acrossthe heat passage into registerin relation with the openings in the outer she l; air inlet and delivery connectionsextending through the inlet and outlet openings into the corresponding passages and arranged to seal and retain said passages in communication with the openings; a. burner mounted within the outer shell; and afan mounted upon the shelf and FRANCIS SAUVAIRE. 

